Steam valve-chest.



STEAM VALVE CHEST.

APPLICATION FILED JULYH. 1916.

6 ,953. Patented Apr. 9,1918; 7

2 SHEETS-SHEET l.

Attorneys 7 J. E. MUHLFELD & G. W. CLENDON.

STEAM VALVE CHEST.

APPLICATION FILD JULYH, 195.

1,261,953. Patented Apr. 9, 1918.

2 SHEETS-SHEET 2- 1 mm I i, '5 1M -H I i 5 O In InvehTm-s MI j'neys in position in the event of UNITED STATES F OFFICE.

JOHN E. MUHLFELD, OF SCARSDALE. AND GEORGE W. CLENDON, OF BROOKLYN, NEW YORK, ASSIGNOBS TO ECONOMY DEVICES CORPORATION, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

STEAM VALVE-CHEST.

Original application filed September 7, 1915, Serial No. 49,184. Divided and this application filed July 11,

Specification of Letters Patent.

1916. Serial No. 108,576.

tion Serial Number 49,184, filed September 7th, 1915, for safety aperture closure.

One of the primary objects of our invention is to provide a simple and economical arrangement of valve chest having improved means whereby ready access may be had to the valve parts in the interior of the chest. Another of the objects of our invention con 'sists in utilizing certain of the standard parts of the valve chest as a safety means for retaining certain of the valve chest parts failure of the normal fastening means. Our invention further contemplates a novel arrangement of detachable end-plate for the valve chest, the advantages of which will hereinafter be set forth. In addition, our invention comprises the provision of an improved endplate for the valve chest whereby the joint between the plate and the valve chest may be located back of means used to removably connect the valve chest to the cylinder, and also the utilization of such means as a safety device, preventing the plate from blowing off of the valve chest in the event of the failure of the means for detachably securing the plate to the chest.

The foregoing, together with such other objects as may hereinafter appear, or are incident to our invention, we obtain by means of a construction, a preferred embodiment of which we have listed in the accompanying drawings wherein:

Figure 1 is a longitudinal section through a steam engine valve chest embodying our invention; Fig. 2 is a front end elevation of Fig. 1; Fig. 3 is a sectional detail taken on the line III-III of-Fig. 1; Fig. 4 is a front end elevation of a valve chest embodying a modification of our invention V pipe (not shown).

of Fig. 4; and Fig. 6 is a detailed section pf still another modification of our invenion.

Referring particularly to Figs. 1 and 2, it will be seen that we have shown a portion of the cylinder 1 of a locomotive, which cylinder is provided with a flat valve face 1 having induction and eduction port openings 2-2, intermediate which is an exhaust port opening 3. The induction and eduction port openings 22 form the terminals of the induction and eduction ports 2 which lead to opposite ends of the cylinder 1. The port opening 3 is a terminal of the exhaust port 3 which communicates with an exhaust A segmental or D shaped valve chamber 4, open at the ends, is detachably secured to the valve face by any preferred means, there being interposed between the valve face and the valve chamber a plurality of gaskets 6, which may be of any preferred type, but Which are shown in the drawings in the form of joint Wires. Removably mounted in the valve'chamber 4 is an open-ended, suitably ported, cylindrical bushing 7 in which the piston dis tribution valve reciprocates. This piston valve comprises two cylindrical heads 88 provided with suitable packing rings and an intermediate spool 8", the heads and spool being rigidly connected by means of the bolt 8. The stem for operating the valve is indicated by the numeral 9. Inclosing the valve mechanism is a valve chest 10 which is preferably cast integral and which is detachably secured to the cylinder 1 by means of a plurality of studs 11 and nuts 11*, a suitable gasket l0ibeing interposed between the valve chest and the valve chest seat formed on the cylinder. The valve chest mechanism just described is what is known as the universal valve chest by means of which it is possible to substitute for the ordinary slide valve mechanism, a piston type distribution valve, without the substitution of new parts. It will be understood, however, that our invention is equally well applicable to other forms of standard valve chests.

Heretofore it has been the customary practice to cast the'valve chest as an integral unit, and although peep-holes have been provided therein, the valve chest was usuloo .t any of the We propose to n the valve chest of ove the valve parts tor or replacement to.

s Wh operag our improved enelor 1. With this in view, the valve 1 l coviclecl at its torvvard entl vv. in

e or opening 12 having; a shoal: The end-plate preferably s cylin'lrical. inemher 13 having a Zillii shoulder or offset portion oonding to the shoulder 12 he gasket 13", preferably of i :ereosecl between the shouliicl 13', and the cool-"plate is reel in position by means oi a L ancl nuts l i. Formecl ensive arrangement res is prevented :tzona hlovving e chest in the event tee will thus he r t- 7; is 3- -6 101 as s use i Wile-n pass tniou i late nerforin a double itinction, namely, they have their normal iUITlClJlOIl of securing the valve chest 10 cylinder 1,

v o and thev :torni a sarety retaining means tor e e1 late. Thus While the end-plate is read removable for purposes or as Q nspection, repair or ad ustment, no additional are requirecl to secure these additional advantages.

Inasmuch as the end-plate must have 'novenient relative to the safety holding orcle that a tight joint hetvveen e end-plate and the valve chest may at all be securee, the diameter of the holes is made larger than that of studs Iii "which pass therethroaflhi in orcler to pre vent leakage through the openings 1:) anti around the stucls 11, the aperture 12 and end-plate are so iorinecl that the shoulders 12* ancl 13 locatecl to the rear of the studs 11; is to say, the joint'tor the closure is locatecl between the safety holding means the pressure cavity of the valve chest proper. will he seen that by this improved construction a steam tight joint "for the enclqalate is secured vvhile at same time the safety means is so arranged the nuts is may he ireel drawn time to time to tighten the joint, as its he'i'eii'lbeifore nointecl s s'in'ole, efieetive I 1; as out a sehoir in thenuroher of parts while at the same time the casket or other cachin means employed 5 the arrangement of valve chest is suhstantially the same but differs from. that previously described in that the aperture or opening 12 in the valve chest and the emlplate are oi rectangular shape, the endplate being provided with a olurality of slots 15 instead of holes 15 as shown in the construction of Figs. 1, 2 and 3. These slots extend rearwartlly "from the front :taoe oi? end-plate to a point approximately a 'acent is ie rear Wall of the cnclplate and it vill he readily seen that the slots permit movement of the end-plate relative to the studs 11 so that the joint may be tightened Whenever necessary.

in too construction shown in Fig. 6, the ooening 152 in the valve chest 10 is tapered and threaded and the end-plate 13 is in the form of a tapered threaded plug having a squares encl 18 A. single hole 17 is formed. the plug "for the reception of a stud; 3.1, which this case acts not only as a safety element but also as a means for preventing the plug from turning loose.

fife claim:

it. The combination in a steam engine valve chest having an orifice, of halts for cletachahly securing said. valve chest to the engine cylinder, an end-plate for said orifice, and means for tletachaloly securing saicl end-plate in position, the saiol enthplate heing so arranged, relative to the valve 0 that the attaching holts tot" saiol valve chest serve as safety retaining means in the event of fai ure oi the means for rletachahlv curing the closure member in position.

2. The combination in a steamy engine valve chest having an orifice, of means for detachably fastening the valve chest to the engine cylinder, and an end-plate for said orifice, certain of the means for detaohahly securing the valve chest to the engine cylincler being located outside of the inner face of the encl-plate thereby serving as a retaining means therefor.

3. The combination in a steam engine valve chest having an orifice, of means for tieta-chahl v securing the valve chest to the engine cylinder, a closure member for said orifice, certain of said fastening means being locatecl outside of the inner face oiE iai l closure to act as a retaining means therefor, and a packing between the valve chest and saicl closure located. intermediate the said fastening means and. the pressure chamber of the valve chest.

4-. The combination in a steam engine valve chest having an orifice, of means for cletachahlv securing the valve chest to the gins cvliniler, a closure member for said 2, 1 as for detachable scouting the w its menses "said" closure member to the valve chest, a

partiof said means for detachably fastening the valve chest to the en ine cylinder having cooperative relation 'wit the closure membet to retain the same in position in the event 'of the failure of the means ,for detachably fastening the closure member to the valve chest. v

5. The combination in a steam engine valve chest having an orifice, of means for detachably fastemng the valve chest to the engine cylinder, a closure member for said orifice, certain of said fastening means hav ing a lost motion connection with said closuremember', and means for adjusting the position of the closure member with reference to the valve chest.

- v 6. The combination in a steam engine valve chest having an orifice} of an adjustable" closure member for'said orifice, and. means-forfdetachably securing said valve chest'to the engine cylinder, certain of said fastening means cooperating with said closure member to act as a safety retaining means therefor.

7. The combination in a steam engine valve chest having an orifice, of a closure member for said orifice, means for detachably' securing said closure member to valve chest, and means for detachably tening the valve chest to the en 'ne cy inder having cooperative relation wit the closure member to retain the same in position in the the fas 3i)- i eventof the failure of the means for detachably fastening the closure member to the valve chest.

8, The combination in; a steam engine valve chest havmg an -orifice, of a closure member for said orifice, means for detachably securing said closure member to the valve chest, means for detachably fastening the valve chest to the engine cylinder having cotiperative relation with the closure memher to retain the same in position in the event of the failure of the means for detach- JOHN E. i; I i v I FELD. GEORGE W. CLENDON. 

